Been playing with mine for around a week now, and I'm impressed with everything so far, and I haven't even tested out the animal AF yet. But then I'm coming from a T4i, so I guess it'd be hard not to be.
Attached a picture I took today. Not the best photographically, but definitely resolving far more detail than I'm used to. First Image is a Lightroom jpeg export of a RAW file with only LR's lens profile correction and remove CA applied. No other adjustments. Second one is a screen grab at 100% zoom, after processing.
One thing I did notice, is that the RAW files seem to be smaller than my T4i. They're .cr3 rather than .cr2... I tried to research into this but was unable to find anythng. Any ideas?